Nitrous oxides gas adsorbing substance and preparation method thereof

A gas adsorbent, nitrogen oxide technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve problems such as low air velocity of processing gas, achieve high-efficiency adsorption, and improve adsorption capacity.

Inactive Publication Date: 2009-07-15
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activated carbon prepared by the invention has a 2 The adsorption performance of S and VOCs is the best, and the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] The preparation steps of nitrogen oxide gas adsorbent are as follows:

[0033] Prepare 3 mL of dilute nitric acid with a concentration of 30% by volume, measure 2.5 g of husk charcoal with 20 to 60 meshes as activated carbon, pile it on the watch glass, soak it with dilute nitric acid drops for 0.5h, wash it to neutrality, and put it in a 150℃ oven Dry for 1h;

[0034] Prepare 3 mL of KOH solution with a concentration of 25% by volume, drop the solution on the dried activated carbon and soak for 1 hour, and then dry it in an oven at 60°C for 3 hours;

[0035] Prepare 3 mL of copper nitrate solution with a concentration of 5% by mass, drop the solution on the dried activated carbon and soak for 0.5h, and then dry it in an oven at 250℃ for 3h. The final active component CuO accounts for the nitrogen obtained in this example. The total mass percentage of the oxide gas adsorbent is 3%.

[0036] The performance evaluation of Example 1 was carried out in a U-sh...

Example Embodiment

[0039] Example 2

[0040] Prepare 3 mL of dilute nitric acid with a volume percentage concentration of 10%. Measure 2.5g of coal-based charcoal with 20 to 60 mesh as activated carbon and pile it on a watch glass, add dilute nitric acid dropwise to it, soak it for 1 hour, wash it to neutrality, and dry it in an oven at 100°C for 2 hours;

[0041] Prepare 3 mL of KOH solution with a concentration of 25% by volume, drop the solution on the dried activated carbon and soak for 1 hour, and then dry it in an oven at 60°C for 3 hours;

[0042] Prepare 3 mL of copper nitrate solution with a concentration of 5% by mass, drop the solution on the dried activated carbon and soak for 0.5 h, and then dry it in an oven at 250° C. for 3 h. The final active component CuO accounts for 3% of the total mass percentage of the nitrogen oxide gas adsorbent prepared in this embodiment.

[0043] Example 2 The performance evaluation was carried out in a U-shaped glass tube reactor, and the reaction gas volu...

Example Embodiment

[0046] Example 3

[0047]Prepare 3 mL of dilute nitric acid with a volume percentage concentration of 30%. Measure 2.5g of 20-60 mesh wood charcoal as activated carbon and pile it on the watch glass, add dilute nitric acid dropwise on it, soak it for 0.5h, wash it to neutrality, and dry it in an oven at 150℃ for 1h;

[0048] Prepare 3 mL of KOH solution with a concentration of 5% by volume, drop the solution on the dried activated carbon and soak for 2 hours, then dry it in an oven at 100°C for 2 hours;

[0049] Prepare 3 mL of ferric nitrate solution with a concentration of 4.5% by mass, drop the solution on the dried activated carbon and soak for 0.5h, and then dry it in an oven at 250°C for 3h. Final active component Fe 2 O 3 The total mass percentage of the nitrogen oxide gas adsorbent prepared in this embodiment is 3%.

[0050] The performance evaluation of Example 3 was carried out in a U-shaped glass tube reactor, and the reaction gas volumetric space velocity (GHSV) was 75...

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PUM

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Abstract

The invention relates to a gas adsorbent of nitrogen oxides and a preparing method thereof in the technical field of air pollution. The gas adsorbent of the nitrogen oxides comprises active carbon, alkaline substances and metallic oxides. The preparing method comprises surface active modification, solution impregnation and metal load which are combined for preparing the gas adsorbent of the nitrogen oxides. The obtained adsorbent has high adsorption rate, large adsorption capacity and long penetration time to the nitrogen oxides, the preparation cost is lower than that of the prior art, and the preparation process is simple.

Description

technical field [0001] The invention relates to an adsorbent in the technical field of chemical industry and a preparation method thereof, in particular to a nitrogen oxide gas adsorbent and a preparation method thereof. Background technique [0002] Among various air pollutants, NO x pollution and the harm it causes cannot be ignored. Most of NOx comes from fuel combustion, that is, vehicle exhaust, industrial kiln emissions, etc. The main component of NOx is NO, which is slowly oxidized in the atmosphere into brown-red NO with a pungent odor 2 . NOx is the main pollutant that forms acid rain and acid mist, and can form photochemical smog with hydrocarbons, and also participates in the destruction of the ozone layer. Nitrogen oxides are harmful to the human body and mainly invade the bronchioles and alveoli in the deep part of the respiratory tract, which can strongly stimulate and corrode lung tissue and cause pulmonary edema. High concentrations of nitric oxide can a...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/32B01D53/02
Inventor 张豪杰姚炜周莹周洁何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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